Update aosp/master clang for rebase to r256229

http://b/26987366

Change-Id: I5d349c9843ea5c24d6e455956f8a446393b6873d
diff --git a/lib/Edit/Commit.cpp b/lib/Edit/Commit.cpp
index 9c08cc2..cb7a784 100644
--- a/lib/Edit/Commit.cpp
+++ b/lib/Edit/Commit.cpp
@@ -183,7 +183,7 @@
   data.Kind = Act_Insert;
   data.OrigLoc = OrigLoc;
   data.Offset = Offs;
-  data.Text = copyString(text);
+  data.Text = text.copy(StrAlloc);
   data.BeforePrev = beforePreviousInsertions;
   CachedEdits.push_back(data);
 }